user
What is the Einstein–Brillouin–Keller quantization condition?
Response:
assistant
The Einstein–Brillouin–Keller (EBK) quantization condition is a quantum-mechanical rule that specifies the allowed energy levels or “quantum states” of a particle confined in a particular region of space. It states that when the particle has a total energy that is the sum of some multiple of the energy of the particle's motion in the region, it is allowed to exist in a distinct quantum state. The particle's motion is restricted to a certain area of space and its energy must be an integer number of times its angular momentum. This quantization condition is named after the three physicists who developed it: Albert Einstein, Léon Brillouin, and Jacobus Kapteyn.